The first (oldest) ATM I ever saw was from The Cream of Cumback Pussy-Nothing Butt. I am pretty sure it was from originally from Cumback Pussy 9. The scene stared Peter North and Tiffany Mynx with Tera Heart. Peter North is fucking Tera's ass. Tiffany licks his dick as its going in an out. She pulls it out and gives it a real cleaning. Just when you think she is done she goes on to spread, lick, and tongue fuck Tera's ass. Explosive by the standards of the time it was filmed. I believe I wore out the VHS recorder watching. What was the first ATM you saw?
Although I'm sure I saw A2M before this (Aja did one a couple of years earlier, but I didn't notice it, as did Summer Rose in Between the Cheeks - 1989), the first one that registered for me as a calculated filthy escalation of nastiness was Kiss sucking Rocco's dick out of Rebecca Bardoux's ass in Face Dance 2 (Evil Angel) in 1992. Rocco is in my opinion the most significant trailblazer in the realm of A2M. That he's still cranking it out 30 years later is astounding.
Excellent topic. I've often thought of starting this thread myself but what always stopped me is that I can't remember the scene where I first saw an ATM. I do know how I reacted to it - shock and arousal. I remember being blown away by it in a way that I hadn't been before and have rarely been since. I didn't know such a thing existed and I didn't know there were women nasty enough to do it. My guess is that it happened in the early-to-mid-1990s, though whatever I saw it in could have been older. I can make that guess because that's around when gonzo porn was starting and that's also the time when porn became more accessible for me.
To this day, I still love seeing ATM and I'm disappointed when there is an edit between the cock coming out of the ass and into the mouth.
I'll be checking in on this thread to read what other people remember as their first ATM sighting.
^ Trying to explain why any sex act is a big deal to someone is likely impossible. No one could explain a lot of sex acts to me in a way that I could understand. Take horror porn or scat, for example. There is no way in a million years that I could understand the attraction and arousal yet lots of people are aroused by those. I think part of it for me, and it's only part and I'm only speaking for myself, is that if you have a model who does ATM it indicates to me that we're dealing with a model who is nasty and depraved. Why do I like that? No idea. It would be like me explaining why I don't like shellfish.
The bottom line (no pun intended) is that those of us who like ATM like ATM.
Though not the real deal, because of an obvious edit, the first implied ATM I saw was in the first hardcore film I ever saw, The Devil in Miss Jones from 1973. Early in the film, Harry Reems sticks a dildo in Georgina Spelvin's ass, telling her she must keep it in. Later in the scene, she asks him to give it to her. There's a cut from him taking the dildo out of her ass to her face as she takes the dildo, presses it to her mouth, and then sucks it deep in her mouth. I was shocked, to say the least.
The first true ATM I saw was in Up 'n Coming from 1982. John Holmes pulls out of Marilyn Chamber's ass and comes on her belly, after which Lili Marlene licks up the cum and licks the head of his dick. She doesn't take it into her mouth (though she does in other films), but I think this one counts and was equally shocking.